Machine for heating surfaces.



No. 805,337. PATENTED NOV. 21, 1905.

, G. H. LUTZ & 0. HUBBELL.

F. 0. BLAKE MACHINE FOR HEATING SURFACES.

APPLICATION FILED DEC. 24'. 1904.

3 vw e tozfi gran/f O B/a Ke UNITED STATES PATENT OFFIOE.

FRANK O. BLAKE, OF CINCINNATI, OHIO, AND GEORGE H. LUTZ AND ORRA HUBBELL, OF INDIANAPOLIS, INDIANA.

MACHINE FOR HEATING SURFACES.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed December 24, 1904. Serial No. 238,262.

To all whont t't may conccrnr Be it known that we, FRANK O. BLAKE, of.

Cincinnati, county of Hamilton, State of Ohio, and GEORGE H. LUTZ and ORRA HUBBELL, of Indianapolis, county of Marion, State of Indiana, have invented a certain new and useful Machine for Heating Surfaces; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like figures refer to like parts.

The object of this invention is to improve the construction and operation of machines for heating surfaces, and we show said invention herein embodied in a machine for heating asphalt pavement.

One feature of the invention consists in providing a fan intermediate the tank in which the air is heated and a hood that is movable over the surface to be heated, so that it will draw air into and from said heating-tank and blow the same into said hood. This not only gives a much greater effect in the hood by reason of the immediate and direct blast from the fan, but it also tends to create within the heating-tank a vacuum that draws the air into the tank and also tends to draw the fuel into the tank. This enables us to dispense With means for introducing fuel into the tank under pressure. Where the air is forced first into the air-heating tank, instead of the tendency being to create a vacuum in said tank it is the oppositenamely, to make greater air-pressure in said tank, and thus effectually retard the inflow of fuel into the tank, so that it becomes necessary to introduce such fuel against such high pressure by means of some external appliance for forcing the fuel in under a greater pressure.

The foregoing and the other features of our invention will be understood from the accompanying drawings and the following description and claims.

In the drawings, Figure 1 is a central vertical longitudinal section of a portion of a machine for heating surfaces. Fig. 2 is a transverse section on the line 2 2 of Fig. 1. Fig. 3 is a rear elevation of the device. Fig. 4 is a sectional view, on an enlarged scale, of the fuel-inlet. Fig. 5 is a transverse central vertical section of the hood on the line 5 in Fig. 1. Fig. 6 is a section of a portion of the top of the hood and damper on a larger scale than that shown in Fig. 5.

closed by dampers 18.

In detail, a vehicle is provided with suitable wheels 10, carrying an axle 11 and bearings like the bearing 12 for supporting the longitudinal I-beams 13, that by means of the brackets 14 carry an air-heating tank 65, longitudinally disposed of the vehicle. Said tank has about equidistant from a point over the axle two perforated partitions 64.. As herein shown, said partitions consist of open brickwork. These divide the tank, in one sense, into three chambers, one at each end and one at the middle. The middle and rear chambers have air-'inlet openings closed or controlled by dampers 15. At the front end of the tank there are air-inlet openings 17, There may be any number of these air-inlet openings and they should surround the fuel-inlet. Fuel is supplied to the burner 20 at the end of the steampipe 24 through a pipe 22, leading into said steam-pipe from a fuel or oil tank 23. The burner is perforated and the steam-pipe leads from any suitable source of steam. This steam-pipe is not necessary, but is preferable. The fuel-supply pipe should extend inward beyond the end of the tank for a reasonable distance, so that the incoming air from the air-inlet openings 17 will supply oxygen to the burner.

By reason of the foregoing construction a flame will be maintained in the left-hand end of the air-heating tank, and the heated air will pass substantially directly to the outlet 25 at the right-hand end of the tank. That outlet pipe 25 leads into the fan-casing 26, and a pipe 27 leads from the fan-casing 26 into the pipe 28, which in turn enters a pipe 68, that is secured centrally to the top of the antechamber 29 over the hood 3Q. There is a telescoping action between the pipes 27 28, and 68, so that the latter, including the hood, may be elevated and the hood may be removed from the machine, as heretofore set forth. Therefore said pipes 27, 28, and 68 have vertical slots extending through them for a part of their length,in which removable pins extend. These pins limit the telescoping movement of said pipe-sections, and when desired the pins may be removed and the hood separated.

The 31 fan is driven by a pulley 32, and the operation of the fan draws the air and fuel into the tank and the heated air through the tank and out of the tank and into the fan-casing and expels it from the fan-casing in a blast through the hood. The fan-shaft 33 is mounted on a two-legged stand 34, with its lower ends on the I-beams 13, as shown in Fig. 3.

The hood has an antechamber 29, which is rectangular, the length being considerably greater than the width, and has in it a stationary deflector 35 immediately under the inlet from said antechamber. A partition 36 lies between the antechamber and the lower part of the hood and has a number of openings 37 through it, that are closed by dampers 38, operated by handles 39 on the outside. Each opening 37 from the antechamber leads into a separate compartment of the hood. The lower part of the hood is divided into compartments by partitions 40, and in each compartment there is secured a deflector 41. The purpose of all these deflectors is to prevent the air from passing straight and shortcircuiting, and they distribute the air so that it will spread rather equally over the surface to be heated.

The hood is vertically movable, so that it can be elevated or lifted from the ground by the lever 50, secured rigidly to the crank-shaft 51, that is mounted in brackets 52 in the rear end of the air-heating tank and has at each end a crank 53, connected by links 54 and 55 to hooks on each side of the hood. Said lever 50 operates between two bars 61 and 62, which have perforations to receive the pin 63, whereby said lever is held in such position as would cause the hood to hang at the desired elevation.

What we claim as our invention, and desire to secure by Letters Patent, is

1. In a machine for heating surfaces, ahori- Zontally-disp'osed air-heating tank with an airinlet at one end thereof, means near the airinlet for heating the air, a hood movable over the surface to be heated, a fan at the other end of said tank over the hood, and a connection between the fan and hood whereby airwill be drawn into, longitudinally through and from said heating-tank and blown into said hood.

2. In a machine for heating surfaces, an air-heating tank with an air-inlet at one end, a fuel-supply near said air-inlet, a perforated partition in said tank, a hood movable over .the surface to be heated, and a fan at the other end of said tank and intermediate the hood and tank for drawing the heated air through said partition and from said tank and blowing it into said hood.

3. In a machine for heating surfaces, an air-heating tank, a fuel-supply pipe entering one endof said tank, a fuel-tank from which said fuel-supply pipe leads and which is located on a higher level than the outlet end of said fuel-supply pipe, a hood movable over the surface to be heated, and a fan at the other end of said tank and intermediate said tank and the hood that draws the fuel into said tank and draws the heated air therefrom and blows it into said hood.

4. In a machine for heating surfaces, an air-heating tank, a steam-pipe entering one end of said tank with its inner end perforated to form a burner, a fuel-supply pipe within said steam-pipe and extending to said burner, a tank for supplying fuel to said pipe, a hood movable over the surface to be heated, and a fan at the other end of said air-heating tank that draws the air therefrom and blows it into said hood.

5. In a machine for heating surfaces, an air-heating tank, a hood that is provided with a compartment adapted to contact with the surface to be heated, an antechamber upon said compartment with damper controlled openings leading therefrom to the hood, and a fan intermediate the heating-tank and the hood that draws air from the tank and blows it into said antechamber.

6. In a machine for heating surfaces, an air-heating tank,'a hood with a compartment adapted to contact with the surface to be heated, an antechamber over said compartment with damper-controlled openings leading therefrom to the hood, a pipe leading into the antechamber, stationary deflectors in said hood and antechamber opposite all inlets, partitions in said hood between said deflectors, and a fan intermediate the hood and the tank for drawing air from the tank and forcing it through the inlet-pipe into said antechamber.

7. In a machine for heating surfaces, an air-heating tank, a fan-casing mounted in connection therewith and communicating with said tank and having a downwardly-extending pipe, a hood with an upwardly-extending pipe, an intermediate pipe-section, said pipes telescoping each other successively and having vertical slots in them, removable pins eX- tending through said vertical slots for guiding and limiting the telescoping movement of said pipes and rendering them detachable, and means for elevating said hood.

In witness whereof we have hereunto affixed our signatures in the presence of the witnesses herein named.

FRANK O. BLAKE. GEORGE H. LUTZ. ORRA HUBBELL.

Witnesses as to F. 0. Blake:

RICHARD HENRY MOORE, CARRIE Moons.

IVitnesses as to George H. Lutz and Orra Hubbell:

N. ALLEMoNe,, V. H. LOCKWOOD. 

